Yes. Probably.
But you've got bigger problems.
There are two main types of memory on your computer (actually 3, but i'm simplifying), physical RAM and "Virtual RAM."
Physical RAM is the memory that comes on chips that you have to buy and install in your computer. While Virtual RAM (aka, Virtual Memory, Swap, Pagefile, etc) is part of your hard drive (the storage part of your computer) that's allocated for use if you run out of physical RAM.
Your hard drive is FAR slower (like, 1000 times slower) than physical RAM. So using it as physical RAM will slow down your computer considerably. But if you're out of physical RAM, your computer must use virtual RAM or start closing programs. There's no other option.
If you're low on virtual memory, that means that, not only have you run out of physical RAM, but you're running low on hard drive space, too. So you need to do a couple things:
1: Buy more physical RAM if possible.
If you go to http://www.crucial.com/ there is a tool that will help you determine if you can put more physical RAM in your computer and what kind you need to get. RAM is pretty cheap, and you can install it yourself. So you can probably do an upgrade for $30-100 (depending on what kind of RAM you need and how much you buy).
2: Clean your computer.
Run a virus scan and malware scan. Get rid of any programs you don't use (especially programs running all the time). Get rid of files you don't need to free up hard drive space. If necessary, but a second hard drive and move stuff to it to free up space on your primary drive.
That should take care of your problems.